feat: ETag / If-None-Match (304) support on StreamOne and StreamAggregate (fixes #5010) - #5015

/home/runner/work/marten/marten/src/Marten/Internal/Sessions/DocumentSessionBase.ProjectionStorage.cs(215,52): warning CS0693: Type parameter 'TId' has the same name as the type parameter from outer type 'ProjectionStorage<TDoc, TId>' [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Members/ValueCollections/ValueCollectionMember.cs(158,19): warning CS0114: 'ValueCollectionMember.LocatorForIncludedDocumentId' hides inherited member 'QueryableMember.LocatorForIncludedDocumentId'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Internal/Sessions/DocumentSessionBase.ProjectionStorage.cs(27,54): warning CS8633: Nullability in constraints for type parameter 'TId' of method 'DocumentSessionBase.FetchProjectionStorageAsync<TDoc, TId>(string, CancellationToken)' doesn't match the constraints for type parameter 'TId' of interface method 'IStorageOperations.FetchProjectionStorageAsync<TDoc, TId>(string, CancellationToken)'. Consider using an explicit interface implementation instead. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Internal/Sessions/DocumentSessionBase.ProjectionStorage.cs(27,54): warning CS8633: Nullability in constraints for type parameter 'TDoc' of method 'DocumentSessionBase.FetchProjectionStorageAsync<TDoc, TId>(string, CancellationToken)' doesn't match the constraints for type parameter 'TDoc' of interface method 'IStorageOperations.FetchProjectionStorageAsync<TDoc, TId>(string, CancellationToken)'. Consider using an explicit interface implementation instead. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Internal/Sessions/QuerySession.Metadata.cs(21,42): warning CS8767: Nullability of reference types in type of parameter 'value' of 'void QuerySession.CurrentUserName.set' doesn't match implicitly implemented member 'void IMetadataContext.CurrentUserName.set' (possibly because of nullability attributes). [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Members/DuplicatedArrayField.cs(145,17): warning CS0108: 'DuplicatedArrayField.ReplaceMember(MemberInfo, IQueryableMember)' hides inherited member 'DuplicatedField.ReplaceMember(MemberInfo, IQueryableMember)'. Use the new keyword if hiding was intended. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Members/DuplicatedArrayField.cs(116,29): warning CS0108: 'DuplicatedArrayField.FindMember(MemberInfo)' hides inherited member 'DuplicatedField.FindMember(MemberInfo)'. Use the new keyword if hiding was intended. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Internal/ValueTypeIdentifiedDocumentStorage.cs(33,110): warning CS8714: The type 'TValueType' cannot be used as type parameter 'TId' in the generic type or method 'IDocumentStorage<T, TId>'. Nullability of type argument 'TValueType' doesn't match 'notnull' constraint. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Internal/ValueTypeIdentifiedDocumentStorage.cs(33,110): warning CS8714: The type 'TDoc' cannot be used as type parameter 'T' in the generic type or method 'IDocumentStorage<T, TId>'. Nullability of type argument 'TDoc' doesn't match 'notnull' constraint. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]